Expertise in
1
conditions

Dr. William T. Lester

Internal Medicine
Carlos Fernandez-Del Castillo MD
15 Parkman St, 
Boston, MA 
Accepting New Patients
Offers Telehealth
Expertise in
1
conditions
Carlos Fernandez-Del Castillo MD
15 Parkman St, 
Boston, MA 

Overview

William Lester is a primary care provider, practicing in Internal Medicine in Boston, Massachusetts.

Dr. Lester is highly rated in 1 condition, according to our data. His clinical expertise encompasses Congenital Cataract, Primary Biliary Cholangitis, Reynolds Syndrome, and Eosinophilic Granulomatosis with Polyangiitis (EGPA, Churg-Strauss Syndrome).

He is actively involved in clinical research, co-authoring 15 peer reviewed articles. Dr. Lester is currently accepting new patients.

Specialties

Internal Medicine

Licenses

Internal Medicine in MA

Hospital Affiliations

Newton-Wellesley Hospital
Massachusetts General Hospital
Massachusetts Eye And Ear Infirmary -
North Shore Medical Center -
Brigham And Women's Hospital

Languages Spoken

English

Gender

Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

Find your insurance
Find your insuranceClose

Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Anthem BCBS
  • EPO
  • HMO
  • POS
  • PPO
Blue Cross Blue Shield
  • EPO
  • HMO
  • POS
  • PPO
Blue Shield of California
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE-MEDICAID PLAN
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
BMC HealthNet
  • HMO
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE SNP
Cambia Health Solutions
  • EPO
  • INSURANCE PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • PPO
Change Healthcare
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
Cigna
  • EPO
  • HMO
  • PPO
Commonwealth Care Alliance
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
Health Care Services Corporation
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
Humana
  • HMO
  • INDEMNITY
  • POS
  • PPO
Managed Medicaid
  • OTHER MANAGED MEDICAID
Mass General Brigham Health Plan
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • PPO
Medicaid
  • OTHER MEDICAID
  • STATE MEDICAID
MetLife
  • PPO
Premera Blue Cross
  • INSURANCE PLAN
  • MEDICARE MAPD
  • OTHER COMMERCIAL
  • PPO
Tufts
  • HMO
UnitedHealthcare
  • EPO
  • HMO
  • POS
  • PPO
Walgreens
  • MEDICARE DISCOUNT CARD
  • MEDICARE PDP
  • OTHER MEDICARE
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 15 Less Insurance Carriers -

Locations

Carlos Fernandez-Del Castillo MD
15 Parkman St, Boston, MA 02114

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.

15 Total Publications

Dedicated AI Expert System vs Generative AI With Large Language Model for Clinical Diagnoses.
Dedicated AI Expert System vs Generative AI With Large Language Model for Clinical Diagnoses.
Journal: JAMA network open
Published: May 29, 2025
Similar Doctors
Expertise in
22
conditions
Dr. Gabriela S. Hobbs
Internal Medicine
Expertise in
22
conditions
Dr. Gabriela S. Hobbs
Internal Medicine

Massachusetts General Hospital

55 Fruit St, 
Boston, MA 
 (0.1 miles away)
617-724-1124
Experience:
18+ years
Languages Spoken:
English
See accepted insurances
Accepting New Patients
Offers Telehealth

Gabriela Hobbs is a primary care provider, practicing in Internal Medicine in Boston, Massachusetts. She has been practicing medicine for over 18 years. Dr. Hobbs is highly rated in 22 conditions, according to our data. Her clinical expertise encompasses Myeloproliferative Neoplasms (MPN), Myelofibrosis, Polycythemia Vera, Bone Marrow Aspiration, and Colonoscopy. Dr. Hobbs is currently accepting new patients.

Expertise in
27
conditions
Dr. Carlos A. Camargo
Internal Medicine
Expertise in
27
conditions
Dr. Carlos A. Camargo
Internal Medicine

Office

125 Nashua St Ste 920, 
Boston, MA 
 (0.1 miles away)
617-726-5276
Languages Spoken:
English
See accepted insurances

Carlos Camargo is a primary care provider, practicing in Internal Medicine in Boston, Massachusetts. Dr. Camargo is highly rated in 27 conditions, according to our data. His clinical expertise encompasses Bronchitis, Asthma, Asthma in Children, Thrombectomy, and Myringotomy.

Expertise in
24
conditions
Dr. Nezam H. Afdhal
Internal Medicine
Expertise in
24
conditions
Dr. Nezam H. Afdhal
Internal Medicine
Before you request

BIDMC - Division Of Gastroenterology/Liver Center

110 Francis Street, 
Boston, MA 
 (2.8 miles away)
617-632-1070
Languages Spoken:
English, Farsi
See accepted insurances
Accepting New Patients

Nezam Afdhal is a primary care provider, practicing in Internal Medicine in Boston, Massachusetts. Dr. Afdhal is highly rated in 24 conditions, according to our data. His clinical expertise encompasses Hepatitis C, Hepatitis, Nonalcoholic Steatohepatitis (NASH), Liver Transplant, and Endoscopy. Dr. Afdhal is currently accepting new patients.

Frequently Asked Questions about Dr. William T. Lester

How do I make an appointment with Dr. William T. Lester?

You can book an appointment with Dr. William T. Lester by calling their office at 617-726-2375. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.

Is Dr. William T. Lester a top-rated expert for Congenital Cataract?

MediFind is an objective health platform that identifies experts based on real-world data. Dr. William T. Lester is classified as an Advanced expert for Congenital Cataract, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.

What conditions does Dr. William T. Lester specialize in?

While Dr. William T. Lester is a Internal Medicine, they have specific expertise in Congenital Cataract, Primary Biliary Cholangitis, and Reynolds Syndrome. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Internal Medicine.

Does Dr. William T. Lester participate in research or clinical trials?

Yes. Dr. William T. Lester has published 15 articles and abstracts on conditions like Congenital Cataract. You can view a list of Dr. William T. Lester's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.

Does Dr. William T. Lester accept my insurance?

Dr. William T. Lester accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 617-726-2375 to verify that your specific plan is currently accepted before your visit.

Areas of Expertise

MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.

Learn more about MediFind’s expert tiers

Find Dr. Lester's expertise for a condition
ConditionClose
      View All 42 Experienced Conditions
      Want to save this doctor for later?
      Sign Up
      Is this your doctor?
      Find A Second Opinion
      Not sure about your diagnosis?
      Check Your Symptoms
       
       
       
       
      Learn about our expert tiers
      Learn More
      Are you the provider on this profile?
      Claim Profile